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-
- ; M7H8-6.ASM -- Heath/Zenith H89 overlay file for MDM7xx. 01/24/85
- ;
- ; You will want to look this file over carefully. There are a number of
- ; options that you can use to configure the program to suit your taste.
- ; This file places particular emphasis on using the Heath/Zenith equip-
- ; ment with 8250 serial I/O. Much of the information contained here is
- ; not in the main file. If not using the Heath/Zenith H89/Z89 equipment
- ; some of the routines here will illustrate what you could do with your
- ; unit.
- ;
- ; Use the "SET" command to change baudrate when desired.
- ;
- ; Edit this file for your preferences then follow the "TO USE:" example
- ; shown below.
- ;
- ;
- ; TO USE: First edit this file filling in answers for your own
- ; equipment. Then assemble with ASM.COM or equivalent
- ; assembler. Then use DDT to overlay the the results
- ; of this program to the original .COM file:
- ;
- ; A>DDT MDM740.COM
- ; DDT VERS 2.2
- ; NEXT PC
- ; 4A00 0100
- ; -IM7H8-6.HEX (note the "I" command)
- ; -R ("R" loads in the .HEX file)
- ; NEXT PC
- ; 4A00 0000
- ; -G0 (return to CP/M)
- ; A>SAVE 73 MDM.COM (now have a modified .COM file)
- ;
- ; NOTE: If the MDM7nn file gets bigger the SAVE 73 will be
- ; larger. Be sure to check the hex number under NEXT..
- ;
- ;-----------------------------------------------------------------------
- ;
- ; Quick, easy alternate method of combining this overlay with
- ; MDM740.COM file using MLOAD.COM (Current version is MLOAD24.)
- ;
- ; A>MLOAD MDM7.COM=MDM740.COM,M7H8-n.HEX <ret>
- ;
- ; = = = = = = = = = = = = = = = = = =
- ;
- ; 02/12/85 - Set to default to 1200 bps, added SETSPD option. Use the
- ; M7H8-7 M7RV-6.ASM overlay for use with Racal-Vadic 1200v or 2400v
- ; smartmodems after using this overlay first. Other changes.
- ; - Irv Hoff
- ;
- ; 01/24/85 - Added support for Racal Vadic/Hayes 2400 baud smartmodems
- ; M7H8-6 - Larry Snyder
- ;
- ; 07/15/84 - Added support for 2400 baud modems
- ; M7H8-5 - Larry Snyder
- ;
- ; 03/16/84 - Added smartmodem EQU so IF/ENDIF statements would work
- ; M7H8-4A work corectly. - Mike Allen
- ;
- ; 02/26/84 - Corrected to allow smartmodem YES without overrunning
- ; M7H8-4 0400H in assembly. - Bill Wood
- ;
- ; 02/15/84 - Made default baud-rate follow the MSPEED equate.
- ; M7H8-3 - Rich Berg
- ;
- ; 12/11/83 - Restricted baud-rate selection for Hayes users. Changed
- ; M7H8-2 signon for Hayes, tells default modem speed at signon.
- ; - Tom Bering
- ;
- ; 10/03/82 - First version of this file - Irv Hoff
- ;
- ;-----------------------------------------------------------------------
- ;
- ;
- ; Set the speed you wish the unit to automatically initialize at:
- ;
- SETSPD EQU 5 ; 2=300, 5=1200, 6=2400 bps (select one)
- ;
- ;-----------------------------------------------------------------------
- ;
- ;
- NO EQU 0
- YES EQU 0FFH ; (must be a 8-bit value for ASM.COM)
- ;
- ;
- BELL EQU 07H ; Bell
- CR EQU 0DH ; Carriage return
- ESC EQU 1BH ; Escape
- LF EQU 0AH ; Linefeed
- ;
- ;
- ; Change the value at MODDATP if it does not match what you are using.
- ;
- MODDATP EQU 0D8H ; Data port for H89
- MODCTL1 EQU MODDATP+5 ; Status port for H89
- MODRCVB EQU 1 ; Bit to test for received data
- MODRCVR EQU 1 ; Modem receive ready
- MODSNDB EQU 20H ; Bit to test for ready to send
- MODSNDR EQU 20H ; Modem send ready bit
- ;
- ;-----------------------------------------------------------------------
- ;
- ;
- ORG 100H
- ;
- ;
- ; Change the clock speed if needed, to match your system
- ;
- DS 3 ;(for "JMP START" instruction)
- ;
- PMMIMODEM: DB NO ;yes=PMMI S-100 plug in modem 103H
- AUTODIAL: DB YES ;yes=Hayes protocol, no=other 104H
- TOUCHPULSE: DB 'T' ;T=touch, P=pulse (Smartmodem-only) 105H
- CLOCK: DB 20 ;clock speed in MHz x .1, 25.5 MHz max. 106H
- ;20=2 MHh, 37=3.68 MHz, 40=4 MHz, etc.
- MSPEED: DB SETSPD ;set to desired default. 1=300 2=450 107H
- ;4=600 5=1200 6=2400 8=9600
- BYTDLY: DB 5 ;0=0 delay 1=10ms 5=50 ms - 9=90 ms 108H
- ;default time to send character in ter-
- ;minal mode file transfer for slow BBS.
- CRDLY: DB 5 ;0=0 delay 1=100 ms 5=500 ms - 9=900 ms 109H
- ;default time for extra wait after CRLF
- ;in terminal mode file transfer
- NOOFCOL: DB 5 ;number of DIR columns shown 10AH
- SETUPTST: DB YES ;yes=user-added Setup routine 10BH
- SCRNTEST: DB YES ;cursor control routine 10CH
- RETRY: DB YES ;reset the error limit to try again 10DH
- ;no abort after 10 consecutive errors
- BAKUPBYTE: DB NO ;yes=change any file same name to .BAK 10EH
- CRCDFLT: DB YES ;yes=default to CRC checking 10FH
- TOGGLECRC: DB YES ;yes=allow toggling of CRC to Checksum 110H
- CONVRUB: DB YES ;yes=convert rub to backspace 111H
- TOGGLERUB: DB YES ;yes=allow toggling rub to backspace 112H
- ADDLF: DB NO ;no=no LF after CR to send file in 113H
- ;terminal mode (added by remote echo)
- TOGGLELF: DB YES ;yes=allow toggling of LF after CR 114H
- TRANLOGON: DB YES ;yes=allow transmission of logon 115H
- ;write logon sequence at location LOGON
- SAVCCP: DB YES ;yes=do not overwrite CCP 116H
- LOCONEXTCHR: DB NO ;yes=local command if EXTCHR precedes 117H
- ;no=external command if EXTCHR precedes
- TOGGLELOC: DB YES ;yes=allow toggling of LOCONEXTCHR 118H
- LSTTST: DB YES ;yes=printer available on printer port 119H
- XOFFTST: DB YES ;yes=checks for XOFF from remote while 11AH
- ;sending a file in terminal mode
- XONWAIT: DB NO ;yes=wait for XON after CR while 11BH
- ;sending a file in terminal mode
- TOGXOFF: DB YES ;yes=allow toggling of XOFF checking 11CH
- IGNORCTL: DB NO ;yes=CTL-chars above ^M not displayed 11DH
- EXTRA1: DB 0 ;for future expansion 11EH
- EXTRA2: DB 0 ;for future expansion 11FH
- BRKCHR: DB '@'-40H ;^@ = Send a 300 ms. break tone 120H
- NOCONNCT: DB 'N'-40H ;^N = Disconnect from the phone line 121H
- LOGCHR: DB 'L'-40H ;^L = Send logon 122H
- LSTCHR: DB 'P'-40H ;^P = Toggle printer 123H
- UNSAVE: DB 'R'-40H ;^R = Close input text buffer 124H
- TRANCHR: DB 'T'-40H ;^T = Transmit file to remote 125H
- SAVECHR: DB 'Y'-40H ;^Y = Open input text buffer 126H
- EXTCHR: DB '^'-40H ;^^ = Send next character 127H
- ;
- ;
- DS 2 ; 128H
- ;
- IN$MODCTL1: IN MODCTL1 ! RET ;in modem control port 12AH
- DS 7
- OUT$MODDATP: OUT MODDATP ! RET ;out modem data port 134H
- DS 7
- IN$MODDATP: IN MODDATP ! RET ;in modem data port 13EH
- DS 7
- ANI$MODRCVB: ANI MODRCVB ! RET ;bit to test for receive ready 148H
- CPI$MODRCVR: CPI MODRCVR ! RET ;value of rcv. bit when ready 14BH
- ANI$MODSNDB: ANI MODSNDB ! RET ;bit to test for send ready 14EH
- CPI$MODSNDR: CPI MODSNDR ! RET ;value of send bit when ready 151H
- DS 12 ;PMMI only calls 154H
- ;
- ;
- LOGONPTR: DW LOGON ;for user message. 160H
- DS 6 ; 162H
- JMP$GOODBYE: JMP GOODBYE ; 168H
- JMP$INITMOD: JMP INIT ;go to user written routine 16BH
- RET ! NOP ! NOP ;(by-passes PMMI routine) 16EH
- RET ! NOP ! NOP ;(by-passes PMMI routine) 171H
- RET ! NOP ! NOP ;(by-passes PMMI routine) 174H
- JMP$SETUPR: JMP SETUPR ; 177H
- JMP$SPCLMENU: JMP SPCLMENU ; 17AH
- JMP$SYSVER: JMP SYSVER ; 17DH
- JMP$BREAK: JMP SENDBRK ; 180H
- ;
- ;
- ; Do not change the following six lines.
- ;
- JMP$ILPRT: DS 3 ; 183H
- JMP$INBUF: DS 3 ; 186H
- JMP$INLNCOMP: DS 3 ; 189H
- JMP$INMODEM: DS 3 ; 18CH
- JMP$NXTSCRN: DS 3 ; 18FH
- JMP$TIMER: DS 3 ; 192H
- ;
- ;
- ; The following clear the screen for the H19 or H89 terminal
- ;
- CLREOS: CALL JMP$ILPRT ; 195H
- DB ESC,'J',0,0,0 ; 198H
- RET ; 19DH
- ;
- CLRSCRN:CALL JMP$ILPRT ; 19EH
- DB ESC,'E',0,0,0 ; 1A1H
- RET ; 1A6H
- ;
- SYSVER: CALL JMP$ILPRT ; 1A7H
- DB 'Version for Heath H89 with serial modem'
- DB CR,LF,0
- CALL JMP$ILPRT
- DB 'Default speed: ',0
- CALL BAUD
- CALL JMP$ILPRT
- DB ' bps',CR,LF,0
- RET
- ;.....
- ;
- ;
- ;-----------------------------------------------------------------------
- ;
- ; NOTE: You can change the SYSVER message to be longer or shorter. The
- ; end of your last routine should terminate by 0400H (601 bytes
- ; available after start of SYSVER) if using the Hayes Smartmodem
- ; or by address 0C00H (2659 bytes) otherwise.
- ;
- ;-----------------------------------------------------------------------
- ;
- ; You can put in a message at this location which can be called up with
- ; CTL-O if TRANLOGON has been set TRUE. You can put in several lines if
- ; desired. End with a 0.
- ;
- LOGON: DB 'Hello from an Heath H89 user',CR,0
- ;.....
- ;
- ;
- ; This routine sends a 300 ms. break tone to reset some time-share
- ; computers.
- ;
- SENDBRK:
- MVI A,40H ; Set break tone
- OUT MODDATP+3
- JMP GOODBYE1 ; Send a 300 ms. break tone
- ;.....
- ;
- ;
- ; This routine sends a 300 ms. break tone and sets DTR low for the same
- ; length of time to disconnect some modems such as the Bell 212A, etc.
- ;
- GOODBYE:
- XRA A
- OUT MODDATP+4 ; Set DTR and RTS low
- MVI A,40H ; Set break tone
- OUT MODDATP+3
- ;
- GOODBYE1:
- MVI B,3 ; Wait 300 ms.
- CALL JMP$TIMER
- MVI A,03H ; Reset to normal 8 bits
- OUT MODDATP+3
- MVI A,01H
- OUT MODDATP+4 ; Reset DTR high
- RET
- ;.....
- ;
- ;
- ; Auto-selects the default message baudrate from SELECT option at start
- ; of overlay.
- ;
- BAUD: LDA MSPEED
- CPI 1
- JNZ BAUD5
- CALL JMP$ILPRT
- DB '300',0
- RET
- ;
- BAUD5: CPI 5
- JNZ BAUD6
- CALL JMP$ILPRT
- DB '1200',0
- RET
- ;
- BAUD6: CPI 6
- JNZ BAUD8
- CALL JMP$ILPRT
- DB '2400',0
- RET
- ;
- BAUD8: CALL JMP$ILPRT
- DB '9600',0
- RET
- ;
- ;
- ; Auto selects baud rate from SELECT option near start of overlay, which
- ; initializes the H89 8250 I/O port.
- ;
- INIT: LDA MSPEED
- CPI 1
- JZ OK300
- CPI 5
- JZ OK1200
- CPI 6
- JZ OK2400
- CPI 8
- JZ OK9600
- ;
- INITMOD:MVI A,5 ; Default transfer speed to 1200 baud
- STA MSPEED
- DI ; Turn off interrupts for initialization
- XRA A
- OUT MODDATP+1 ; Interrupt enable register
- MVI A,80H ; Insure out of mode to set baud rate
- OUT MODDATP+3 ; Line control register
- OUT MODDATP+3
- ;
- LSPSPD: MVI A,60H ; Default 'LSP' speed for 1200 baud
- OUT MODDATP ; Register for 'LSP' speed if enabled
- ;
- MSPSPD: MVI A,00H ; Default 'MSP' speed for 1200 baud
- OUT MODDATP+1 ; Register for 'MSP' speed if enabled
- ;
- MVI A,03H ; 8-level, 1 stop bit, no parity
- OUT MODDATP+3 ; Line control register
- MVI A,01H ; Set 'DTR' nromal
- OUT MODDATP+4 ; Modem control register
- EI ; Restore interrupts to normal
- RET
- ;.....
- ;
- ;
- ; The following routine changes the baud rate for the H89 with the SET
- ; command.
- ;
- SETUPR: CALL JMP$ILPRT
- DB 'Select Baud Rate (300, 1200, 2400, 9600) : ',0
- LXI D,BAUDBUF ; Point to input buffer for INLNCOMP
- CALL JMP$INBUF
- LXI D,BAUDBUF+2 ; Compare BAUDBUF+2 with/chars. below
- CALL JMP$INLNCOMP
- DB '1200',0
- JNC OK1200
- CALL JMP$INLNCOMP
- DB '2400',0
- JNC OK2400
- CALL JMP$INLNCOMP
- DB '9600',0
- JNC OK9600
- CALL JMP$ILPRT ; All matches failed, tell operator
- DB '++ Incorrect entry ++',CR,LF,BELL,0
- JMP SETUPR ; None of these, ask again
- ;
- OK300: MVI A,1 ; MSPEED 300 baud value
- LHLD BD300 ; Get 300 baud parameters in HL
- JMP LOADBD ; Go load them
- ;
- OK1200: MVI A,5
- LHLD BD1200
- JMP LOADBD
- ;
- OK2400: MVI A,6
- LHLD BD2400
- JMP LOADBD
- ;
- OK9600: MVI A,8
- LHLD BD9600
- ;
- LOADBD: STA INITMOD+1 ; Store speed to show transfer time
- MOV A,L ; Get least significant baud rate byte
- STA LSPSPD+1 ; Store in INITMOD
- MOV A,H ; Get most signifcant baud rate byte
- STA MSPSPD+1 ; Store in INITMOD
- JMP INITMOD ; Reset H89 8250 for new speed
- ;.....
- ;
- ;
- ; Table of baud rate parameters
- ;
- BD300: DW 0180H
- BD1200: DW 0060H
- BD2400: DW 0030H
- BD9600: DW 000CH
- ;
- BAUDBUF:DB 10,0
- DS 10
- ;
- ;-----------------------------------------------------------------------
- ;
- ; This routine can be used for your equipment, be sure to end with RET.
- ; If using the Hayes Smartmodem this is unavailable without a special
- ; change.
- ;
- SPCLMENU: RET
- ;
- ;-----------------------------------------------------------------------
- ;
- ;
- ; NOTE: MUST TERMINATE PRIOR TO 0400H (with Smartmodem)
- ; 0D00H (without Smartmodem)
- ;
- END